Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 5 - Ratio and Proportion - Review Exercises: 44

Answer

$x=105$

Work Step by Step

We can set the cross products of the given proportion equal to each other and then solve for the unknown variable. $x\times30=45\times70$ $30x=3150$ Divide both sides by 30. $\frac{30x}{30}=\frac{3150}{30}$ $x=105$
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